Penbrook
- County:
- Dauphin County
- County Seat:
- No
- Area (mi²):
- 0.447
- State:
- Pennsylvania
Penbrook is a borough located in Dauphin County, Pennsylvania. Penbrook has a 2026 population of 3,263. Penbrook is currently growing at a rate of 0.18% annually but its population has decreased by -0.12% since the most recent census, which recorded a population of 3,267 in 2020.